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    <title>制作团队</title>
    <style>
        body{
            width: 100%;
            background-image: radial-gradient(farthest-corner at 200px 200px ,orange,rgb(24, 55, 126));
        }
        .nav-wrapper{
            position: fixed;
            width: 100px;
            height: 100px;
           left: 50%;
            top: 30px;
           margin-left: -330px;
        
           
        }
        .nav-wrapper a{
            
            font-size: 20px ;
            text-decoration: none;
            color: rgb(214, 200, 200) ;
          

        }
       
        table{
            width: 50%;
            border: 1px solid black;
            margin: 100px auto;
            border-collapse: collapse;
        }
        td{
            height: 40px;
            vertical-align: middle;
            text-align: center;
        }
        tr:nth-child(2n){
            background-color: orange;
        }
        tr:nth-child(2n+1){
            background-color: #bfa;
        }
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<body>
    <div class="team-wrapper">

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        <table border="1" width='50%' >

            <tr>
                <td>姓名</td>
                <td>学院</td>
                <td>班级</td>
                <td>学号</td>
                <td>联系方式</td>
            </tr>
            <tr>
                <td>周广川</td>
                <td>数计</td>
                <td>软件四班</td>
                <td>201810803093</td>
                <td>18982360284</td>
            </tr>
            <tr>
                <td>梅玉</td>
                <td>数计</td>
                <td>软件四班</td>
                <td>201810803059</td>
                <td>18782387087</td>
            </tr>
            <tr>
                <td>彭文华</td>
                <td>数计</td>
                <td>软件三班</td>
                <td>201810804096</td>
                <td>13551625948</td>
            </tr>
            <tr>
                <td>李智鸿</td>
                <td>数计</td>
                <td>软件四班</td>
                <td>201810804101</td>
                <td>18982360284</td>
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